package com.net.framework.help.widget;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
import android.widget.GridView;

import com.net.framework.help.R;

/**
 * Author：xiaobin.zhang
 * Email：154722566@qq.com
 * Date：2017/5/3 16:09
 * Desc：<--功能描述-->
 */
public class LineNoScrollGridView extends GridView {
    public LineNoScrollGridView(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
    }

    public LineNoScrollGridView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public LineNoScrollGridView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    /**
     * 设置不滚动
     */
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);

    }

    /**
     * 重绘分割线
     */

    @Override
    protected void dispatchDraw(Canvas canvas) {
        // TODO Auto-generated method stub
        super.dispatchDraw(canvas);

        View localView1 = getChildAt(0);
        int column = getWidth() / localView1.getWidth();
        int childCount = getChildCount();
        Paint localPaint;
        localPaint = new Paint();
        localPaint.setStyle(Paint.Style.STROKE);
        localPaint.setColor(getContext().getResources().getColor(R.color.gray_line));
        for (int i = 0; i < childCount; i++) {
            View cellView = getChildAt(i);
            if ((i + 1) % column == 0) {
                if (i != childCount - 1) {
                    canvas.drawLine(cellView.getLeft(), cellView.getBottom(), cellView.getRight(), cellView.getBottom(), localPaint);
                }
            } else if ((i + 1) > (childCount - (childCount % column))) {
                canvas.drawLine(cellView.getRight(), cellView.getTop(), cellView.getRight(), cellView.getBottom(), localPaint);
            } else {
                canvas.drawLine(cellView.getRight(), cellView.getTop(), cellView.getRight(), cellView.getBottom(), localPaint);
                if (i != childCount - 2 && i != childCount - 3) {
                    canvas.drawLine(cellView.getLeft(), cellView.getBottom(), cellView.getRight(), cellView.getBottom(), localPaint);
                }
            }
        }
        if (childCount % column != 0) {
            for (int j = 0; j < (column - childCount % column); j++) {
                View lastView = getChildAt(childCount - 1);
                canvas.drawLine(lastView.getRight() + lastView.getWidth() * j, lastView.getTop(), lastView.getRight() + lastView.getWidth() * j, lastView.getBottom(), localPaint);
            }
        }
    }
}